| 摘要 |
PROBLEM TO BE SOLVED: To provide a means capable of solving the problem of distortion around a game spike peculiar to a board made of a resin without increasing production man-hours or complicating production management. SOLUTION: The game spike 30 has a columnar body shaft part 32 and an implantation part 35 provided on the distal end side of the body shaft part. For the implantation part 35, a length portion close to a driving depth D from the distal end is formed in a tapered conical shape coaxial to the shaft part 32 to provide a sharp point part 36 and projection parts 38 in a wedge shape in the cross sectional view are formed on the outer peripheral surface of the cone of the sharp point part 36. COPYRIGHT: (C)2009,JPO&INPIT
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